helloFile=open("E:\\apache-maven-3.5.0\\repository\\python-study-demo\\python项目案例开发从入门到精通\\文件使用\\hello_test.txt")
fileContent = ""
while True:
    line = helloFile.readline()
    if not line:
        break
    fileContent += line
helloFile.close()
print(fileContent)
